Finding the Third Proportional to 864,640 and 1,381,282

Step by Step Solution

1. Step 1: Write the proportion equation
   864,640 : 1,381,282 = 1,381,282 : x
2. Step 2: Convert to fraction form
   864,640/1,381,282 = 1,381,282/x
3. Step 3: Cross multiply
   864,640x = 1,381,282 × 1,381,282
4. Step 4: Simplify right side
   864,640x = 1,907,939,963,524
5. Step 5: Solve for x
   x = 1,907,939,963,524/864,640
6. Step 6: Final answer
   x = 2,206,629.31